Fix Variable to refer VariableNode.name
Fix Variable to refer VariableNode.name

ysekky/chainer,jnishi/chainer,keisuke-umezawa/chainer,delta2323/chainer,okuta/chainer,aonotas/chainer,niboshi/chainer,okuta/chainer,wkentaro/chainer,jnishi/chainer,tkerola/chainer,kiyukuta/chainer,keisuke-umezawa/chainer,okuta/chainer,okuta/chainer,chainer/chainer,niboshi/chainer,rezoo/chainer,ktnyt/chainer,keisuke-umezawa/chainer,wkentaro/chainer,hvy/chainer,ktnyt/chainer,anaruse/chainer,ktnyt/chainer,niboshi/chainer,chainer/chainer,ktnyt/chainer,chainer/chainer,chainer/chainer,hvy/chainer,wkentaro/chainer,hvy/chainer,keisuke-umezawa/chainer,kashif/chainer,hvy/chainer,jnishi/chainer,jnishi/chainer,niboshi/chainer,wkentaro/chainer,ronekko/chainer,pfnet/chainer